8 year old daughter had red and swollen eye lid, 24 hours now. NO redness in actual eye, no pus, no itchy/grainy feeling, no pain. What could it be?

Periorbital swelling. While it's reassuring that there is no pain, it is still concerning for periorbital cellulitis - an infection of the tissue around the eye. This needs to be evaluated and likely need antibiotics. Get her into her pediatrician ASAP. If her doc doesn't have weekend hours then go to an urgent care or ED for evaluation.
Could be many things. See your eye doctor urgently! If it's swollen for no reason that's not normal. You want to make sure there is no cellulitis developing or worse. Just because there's no itching or pain means it's not an allergy response, but doesn't exclude other causes. Don't delay! We only have 2 eyes. Want to make sure her intraocular pressure is safe too. She needs an eye exam!

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My 3 year old daughter had a sty on her eye lid and it popped about a week ago. Now the whole eye is swollen red/purple looking and it's spreading.

Cellulitis. For now I would continue to do warm compresses if she will sit still long enough to allow you to and I would have her seen ASAP because what you describes sounds like a deeper infection like cellulitis that has to be treated with antibiotics eye drops and oral. I hope this helps. Please let me know what the local doctor says. Read more...
See peds. It sounds like the infection has spread and could be a periorbital cellulitis. This would likely require oral antibiotics for treatment. Don't delay, call the pediatrician today (there's always somebody on-call) and they will be able to direct you. Warm compresses can be helpful before and during the oral antibiotics and can be soothing for your child. Read more...

My left eye lid and below my eye are swollen! It has happened for the last 2 days - when I wake up in the morning, my eye lid and underneath my left eye is swollen. It will tear occasionally. It is not red or itchy. When I wake up in the morning, I hav

Do . Do your eyes itch? Do you have seasonal allergies? Eye rubbing in your sleep can cause the skin around your eyes to swell. Seasonal allergies can cause similar symptoms too. You should have an eye exam because some systemic illnesses, such as thyroid problems, may cause swelling of the tissues around the eyes too. Read more...
Stye treatment. Warm compresses and ocusoft plus lid scrubs, artificial tears, and possible antibiotic/steroid eye medication. If no improvement, intralesional steroid injection and/or excision and drainage. Read more...